Re: [RFC] ARM binutils feature churn causing kernel problems

[Russell King <rmk+lkml@arm.linux.org.uk>]

On Tue, Oct 05, 2004 at 01:57:15PM +0100, Richard Earnshaw wrote:
> On Tue, 2004-10-05 at 12:53, Russell King wrote:
> > diff -up -x BitKeeper -x ChangeSet -x SCCS -x _xlk -x *.orig -x *.rej orig/scripts/kallsyms.c linux/scripts/kallsyms.c
> > --- orig/scripts/kallsyms.c	Sun Jul 11 22:56:39 2004
> > +++ linux/scripts/kallsyms.c	Tue Oct  5 12:51:26 2004
> > @@ -32,6 +32,17 @@ usage(void)
> >  	exit(1);
> >  }
> >  
> > +/*
> > + * This ignores the intensely annoying "mapping symbols" found
> > + * in ARM ELF files: $a, $t and $d.
> > + */
> > +static inline int
> > +is_arm_mapping_symbol(const char *str)
> > +{
> > +	return str[0] == '$' && strchr("atd", str[1]) &&
> > +	       (str[2] == '\0' || str[2] == '.');
> > +}
> > +
> >  static int
> >  read_symbol(FILE *in, struct sym_entry *s)
> >  {
> > @@ -56,7 +67,8 @@ read_symbol(FILE *in, struct sym_entry *
> >  		_sinittext = s->addr;
> >  	else if (strcmp(str, "_einittext") == 0)
> >  		_einittext = s->addr;
> > -	else if (toupper(s->type) == 'A' || toupper(s->type) == 'U')
> > +	else if (toupper(s->type) == 'A' || toupper(s->type) == 'U' ||
> > +		 is_arm_mapping_symbol(str))
> >  		return -1;
> >  
> >  	s->sym = strdup(str);
> 
> Why don't you pass s to is_arm_mapping_symbol and have it do the same
> thing as you've done in get_ksymbol?

"sym_entry" is not an ELF symtab structure - it's a parsed version
of the `nm' output, and as such does not contain the symbol type nor
binding information.

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-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 PCMCIA      - http://pcmcia.arm.linux.org.uk/
                 2.6 Serial core